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Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.241 by root, Fri May 9 13:57:00 2008 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
6	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
7	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
8	*	27	*
9	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
10	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
11	*	30	* in which case the provisions of the GPL are applicable instead of
12	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
13	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
14	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
15	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
16	*	35	* and other provisions required by the GPL. If you do not delete the
17	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
18	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
19	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
30	# include "config.h"	49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
31	#endif	132	#endif
32		133
33	#include <math.h>	134	#include <math.h>
34	#include <stdlib.h>	135	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	136	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	137	#include <stddef.h>
39		138
40	#include <stdio.h>	139	#include <stdio.h>
41		140
42	#include <assert.h>	141	#include <assert.h>
43	#include <errno.h>	142	#include <errno.h>
44	#include <sys/types.h>	143	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	144	#include <time.h>
48		145
		146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
		163	# endif
		164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
49	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
52	# endif	170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
53	#endif	178	#endif
54		179
55	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
57	#endif	182	#endif
58		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
		190	#endif
		191
59	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
60	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
		198	#endif
		199
		200	#ifndef EV_USE_KQUEUE
		201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
		213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		241
		242	#ifndef CLOCK_MONOTONIC
		243	# undef EV_USE_MONOTONIC
		244	# define EV_USE_MONOTONIC 0
61	#endif	245	#endif
62		246
63	#ifndef CLOCK_REALTIME	247	#ifndef CLOCK_REALTIME
		248	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	249	# define EV_USE_REALTIME 0
65	#endif	250	#endif
66	#ifndef EV_USE_REALTIME	251
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	252	#if !EV_STAT_ENABLE
		253	# undef EV_USE_INOTIFY
		254	# define EV_USE_INOTIFY 0
		255	#endif
		256
		257	#if !EV_USE_NANOSLEEP
		258	# ifndef _WIN32
		259	# include <sys/select.h>
68	#endif	260	# endif
		261	#endif
		262
		263	#if EV_USE_INOTIFY
		264	# include <sys/inotify.h>
		265	#endif
		266
		267	#if EV_SELECT_IS_WINSOCKET
		268	# include <winsock.h>
		269	#endif
		270
		271	#if EV_USE_EVENTFD
		272	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		273	# include <stdint.h>
		274	# ifdef __cplusplus
		275	extern "C" {
		276	# endif
		277	int eventfd (unsigned int initval, int flags);
		278	# ifdef __cplusplus
		279	}
		280	# endif
		281	#endif
		282
		283	/**/
		284
		285	/*
		286	* This is used to avoid floating point rounding problems.
		287	* It is added to ev_rt_now when scheduling periodics
		288	* to ensure progress, time-wise, even when rounding
		289	* errors are against us.
		290	* This value is good at least till the year 4000.
		291	* Better solutions welcome.
		292	*/
		293	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
69		294
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	295	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	296	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	297	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
74		298
75	#include "ev.h"	299	#if __GNUC__ >= 4
		300	# define expect(expr,value) __builtin_expect ((expr),(value))
		301	# define noinline __attribute__ ((noinline))
		302	#else
		303	# define expect(expr,value) (expr)
		304	# define noinline
		305	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		306	# define inline
		307	# endif
		308	#endif
76		309
		310	#define expect_false(expr) expect ((expr) != 0, 0)
		311	#define expect_true(expr) expect ((expr) != 0, 1)
		312	#define inline_size static inline
		313
		314	#if EV_MINIMAL
		315	# define inline_speed static noinline
		316	#else
		317	# define inline_speed static inline
		318	#endif
		319
		320	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		321	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		322
		323	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		324	#define EMPTY2(a,b) /* used to suppress some warnings */
		325
77	typedef struct ev_watcher *W;	326	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	327	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	328	typedef ev_watcher_time *WT;
80		329
81	static ev_tstamp now, diff; /* monotonic clock */	330	#define ev_active(w) ((W)(w))->active
		331	#define ev_at(w) ((WT)(w))->at
		332
		333	#if EV_USE_MONOTONIC
		334	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		335	/* giving it a reasonably high chance of working on typical architetcures */
		336	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		337	#endif
		338
		339	#ifdef _WIN32
		340	# include "ev_win32.c"
		341	#endif
		342
		343	/*****************************************************************************/
		344
		345	static void (*syserr_cb)(const char *msg);
		346
		347	void
		348	ev_set_syserr_cb (void (*cb)(const char *msg))
		349	{
		350	syserr_cb = cb;
		351	}
		352
		353	static void noinline
		354	syserr (const char *msg)
		355	{
		356	if (!msg)
		357	msg = "(libev) system error";
		358
		359	if (syserr_cb)
		360	syserr_cb (msg);
		361	else
		362	{
		363	perror (msg);
		364	abort ();
		365	}
		366	}
		367
		368	static void *
		369	ev_realloc_emul (void *ptr, long size)
		370	{
		371	/* some systems, notably openbsd and darwin, fail to properly
		372	* implement realloc (x, 0) (as required by both ansi c-98 and
		373	* the single unix specification, so work around them here.
		374	*/
		375
		376	if (size)
		377	return realloc (ptr, size);
		378
		379	free (ptr);
		380	return 0;
		381	}
		382
		383	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
		384
		385	void
		386	ev_set_allocator (void *(*cb)(void *ptr, long size))
		387	{
		388	alloc = cb;
		389	}
		390
		391	inline_speed void *
		392	ev_realloc (void *ptr, long size)
		393	{
		394	ptr = alloc (ptr, size);
		395
		396	if (!ptr && size)
		397	{
		398	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		399	abort ();
		400	}
		401
		402	return ptr;
		403	}
		404
		405	#define ev_malloc(size) ev_realloc (0, (size))
		406	#define ev_free(ptr) ev_realloc ((ptr), 0)
		407
		408	/*****************************************************************************/
		409
		410	typedef struct
		411	{
		412	WL head;
		413	unsigned char events;
		414	unsigned char reify;
		415	#if EV_SELECT_IS_WINSOCKET
		416	SOCKET handle;
		417	#endif
		418	} ANFD;
		419
		420	typedef struct
		421	{
		422	W w;
		423	int events;
		424	} ANPENDING;
		425
		426	#if EV_USE_INOTIFY
		427	/* hash table entry per inotify-id */
		428	typedef struct
		429	{
		430	WL head;
		431	} ANFS;
		432	#endif
		433
		434	/* Heap Entry */
		435	#if EV_HEAP_CACHE_AT
		436	typedef struct {
		437	WT w;
		438	ev_tstamp at;
		439	} ANHE;
		440
		441	#define ANHE_w(he) (he) /* access watcher, read-write */
		442	#define ANHE_at(he) (he)->at /* acces cahced at, read-only */
		443	#define ANHE_at_set(he) (he)->at = (he)->w->at /* update at from watcher */
		444	#else
		445	typedef WT ANHE;
		446
		447	#define ANHE_w(he) (he)
		448	#define ANHE_at(he) (he)->at
		449	#define ANHE_at_set(he)
		450	#endif
		451
		452	#if EV_MULTIPLICITY
		453
		454	struct ev_loop
		455	{
		456	ev_tstamp ev_rt_now;
		457	#define ev_rt_now ((loop)->ev_rt_now)
		458	#define VAR(name,decl) decl;
		459	#include "ev_vars.h"
		460	#undef VAR
		461	};
		462	#include "ev_wrap.h"
		463
		464	static struct ev_loop default_loop_struct;
		465	struct ev_loop *ev_default_loop_ptr;
		466
		467	#else
		468
82	ev_tstamp ev_now;	469	ev_tstamp ev_rt_now;
83	int ev_method;	470	#define VAR(name,decl) static decl;
		471	#include "ev_vars.h"
		472	#undef VAR
84		473
85	static int have_monotonic; /* runtime */	474	static int ev_default_loop_ptr;
86		475
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	476	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		477
91	/*****************************************************************************/	478	/*****************************************************************************/
92		479
93	ev_tstamp	480	ev_tstamp
94	ev_time (void)	481	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	489	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	490	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	491	#endif
105	}	492	}
106		493
107	static ev_tstamp	494	ev_tstamp inline_size
108	get_clock (void)	495	get_clock (void)
109	{	496	{
110	#if EV_USE_MONOTONIC	497	#if EV_USE_MONOTONIC
111	if (have_monotonic)	498	if (expect_true (have_monotonic))
112	{	499	{
113	struct timespec ts;	500	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	501	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	502	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	503	}
117	#endif	504	#endif
118		505
119	return ev_time ();	506	return ev_time ();
120	}	507	}
121		508
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	509	#if EV_MULTIPLICITY
		510	ev_tstamp
		511	ev_now (EV_P)
		512	{
		513	return ev_rt_now;
		514	}
		515	#endif
123		516
124	#define array_needsize(base,cur,cnt,init) \	517	void
125	if ((cnt) > cur) \	518	ev_sleep (ev_tstamp delay)
126	{ \	519	{
127	int newcnt = cur; \	520	if (delay > 0.)
128	do \
129	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \
131	} \
132	while ((cnt) > newcnt); \
133	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \
136	cur = newcnt; \
137	}	521	{
		522	#if EV_USE_NANOSLEEP
		523	struct timespec ts;
		524
		525	ts.tv_sec = (time_t)delay;
		526	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		527
		528	nanosleep (&ts, 0);
		529	#elif defined(_WIN32)
		530	Sleep ((unsigned long)(delay * 1e3));
		531	#else
		532	struct timeval tv;
		533
		534	tv.tv_sec = (time_t)delay;
		535	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		536
		537	select (0, 0, 0, 0, &tv);
		538	#endif
		539	}
		540	}
138		541
139	/*****************************************************************************/	542	/*****************************************************************************/
140		543
141	typedef struct	544	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147		545
148	static ANFD *anfds;	546	int inline_size
149	static int anfdmax;	547	array_nextsize (int elem, int cur, int cnt)
		548	{
		549	int ncur = cur + 1;
150		550
151	static void	551	do
		552	ncur <<= 1;
		553	while (cnt > ncur);
		554
		555	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		556	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		557	{
		558	ncur *= elem;
		559	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		560	ncur = ncur - sizeof (void *) * 4;
		561	ncur /= elem;
		562	}
		563
		564	return ncur;
		565	}
		566
		567	static noinline void *
		568	array_realloc (int elem, void *base, int *cur, int cnt)
		569	{
		570	*cur = array_nextsize (elem, *cur, cnt);
		571	return ev_realloc (base, elem * *cur);
		572	}
		573
		574	#define array_needsize(type,base,cur,cnt,init) \
		575	if (expect_false ((cnt) > (cur))) \
		576	{ \
		577	int ocur_ = (cur); \
		578	(base) = (type *)array_realloc \
		579	(sizeof (type), (base), &(cur), (cnt)); \
		580	init ((base) + (ocur_), (cur) - ocur_); \
		581	}
		582
		583	#if 0
		584	#define array_slim(type,stem) \
		585	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		586	{ \
		587	stem ## max = array_roundsize (stem ## cnt >> 1); \
		588	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		589	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		590	}
		591	#endif
		592
		593	#define array_free(stem, idx) \
		594	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		595
		596	/*****************************************************************************/
		597
		598	void noinline
		599	ev_feed_event (EV_P_ void *w, int revents)
		600	{
		601	W w_ = (W)w;
		602	int pri = ABSPRI (w_);
		603
		604	if (expect_false (w_->pending))
		605	pendings [pri][w_->pending - 1].events |= revents;
		606	else
		607	{
		608	w_->pending = ++pendingcnt [pri];
		609	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		610	pendings [pri][w_->pending - 1].w = w_;
		611	pendings [pri][w_->pending - 1].events = revents;
		612	}
		613	}
		614
		615	void inline_speed
		616	queue_events (EV_P_ W *events, int eventcnt, int type)
		617	{
		618	int i;
		619
		620	for (i = 0; i < eventcnt; ++i)
		621	ev_feed_event (EV_A_ events [i], type);
		622	}
		623
		624	/*****************************************************************************/
		625
		626	void inline_size
152	anfds_init (ANFD *base, int count)	627	anfds_init (ANFD *base, int count)
153	{	628	{
154	while (count--)	629	while (count--)
155	{	630	{
156	base->head = 0;	631	base->head = 0;
…		…
159		634
160	++base;	635	++base;
161	}	636	}
162	}	637	}
163		638
164	typedef struct	639	void inline_speed
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void
174	event (W w, int events)
175	{
176	if (w->pending)
177	{
178	pendings [w->pending - 1].events |= events;
179	return;
180	}
181
182	w->pending = ++pendingcnt;
183	array_needsize (pendings, pendingmax, pendingcnt, );
184	pendings [pendingcnt - 1].w = w;
185	pendings [pendingcnt - 1].events = events;
186	}
187
188	static void
189	queue_events (W *events, int eventcnt, int type)
190	{
191	int i;
192
193	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);
195	}
196
197	static void
198	fd_event (int fd, int events)	640	fd_event (EV_P_ int fd, int revents)
199	{	641	{
200	ANFD *anfd = anfds + fd;	642	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	643	ev_io *w;
202		644
203	for (w = anfd->head; w; w = w->next)	645	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
204	{	646	{
205	int ev = w->events & events;	647	int ev = w->events & revents;
206		648
207	if (ev)	649	if (ev)
208	event ((W)w, ev);	650	ev_feed_event (EV_A_ (W)w, ev);
209	}	651	}
210	}	652	}
211		653
212	/*****************************************************************************/	654	void
		655	ev_feed_fd_event (EV_P_ int fd, int revents)
		656	{
		657	if (fd >= 0 && fd < anfdmax)
		658	fd_event (EV_A_ fd, revents);
		659	}
213		660
214	static int *fdchanges;	661	void inline_size
215	static int fdchangemax, fdchangecnt;	662	fd_reify (EV_P)
216
217	static void
218	fd_reify (void)
219	{	663	{
220	int i;	664	int i;
221		665
222	for (i = 0; i < fdchangecnt; ++i)	666	for (i = 0; i < fdchangecnt; ++i)
223	{	667	{
224	int fd = fdchanges [i];	668	int fd = fdchanges [i];
225	ANFD *anfd = anfds + fd;	669	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	670	ev_io *w;
227		671
228	int events = 0;	672	unsigned char events = 0;
229		673
230	for (w = anfd->head; w; w = w->next)	674	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
231	events |= w->events;	675	events |= (unsigned char)w->events;
232		676
233	anfd->reify = 0;	677	#if EV_SELECT_IS_WINSOCKET
234		678	if (events)
235	if (anfd->events != events)
236	{	679	{
237	method_modify (fd, anfd->events, events);	680	unsigned long argp;
238	anfd->events = events;	681	#ifdef EV_FD_TO_WIN32_HANDLE
		682	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		683	#else
		684	anfd->handle = _get_osfhandle (fd);
		685	#endif
		686	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
239	}	687	}
		688	#endif
		689
		690	{
		691	unsigned char o_events = anfd->events;
		692	unsigned char o_reify = anfd->reify;
		693
		694	anfd->reify = 0;
		695	anfd->events = events;
		696
		697	if (o_events != events || o_reify & EV_IOFDSET)
		698	backend_modify (EV_A_ fd, o_events, events);
		699	}
240	}	700	}
241		701
242	fdchangecnt = 0;	702	fdchangecnt = 0;
243	}	703	}
244		704
245	static void	705	void inline_size
246	fd_change (int fd)	706	fd_change (EV_P_ int fd, int flags)
247	{	707	{
248	if (anfds [fd].reify || fdchangecnt < 0)	708	unsigned char reify = anfds [fd].reify;
249	return;
250
251	anfds [fd].reify = 1;	709	anfds [fd].reify |= flags;
252		710
		711	if (expect_true (!reify))
		712	{
253	++fdchangecnt;	713	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	714	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255	fdchanges [fdchangecnt - 1] = fd;	715	fdchanges [fdchangecnt - 1] = fd;
		716	}
		717	}
		718
		719	void inline_speed
		720	fd_kill (EV_P_ int fd)
		721	{
		722	ev_io *w;
		723
		724	while ((w = (ev_io *)anfds [fd].head))
		725	{
		726	ev_io_stop (EV_A_ w);
		727	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		728	}
		729	}
		730
		731	int inline_size
		732	fd_valid (int fd)
		733	{
		734	#ifdef _WIN32
		735	return _get_osfhandle (fd) != -1;
		736	#else
		737	return fcntl (fd, F_GETFD) != -1;
		738	#endif
256	}	739	}
257		740
258	/* called on EBADF to verify fds */	741	/* called on EBADF to verify fds */
259	static void	742	static void noinline
260	fd_recheck (void)	743	fd_ebadf (EV_P)
261	{	744	{
262	int fd;	745	int fd;
263		746
264	for (fd = 0; fd < anfdmax; ++fd)	747	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	748	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	749	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	750	fd_kill (EV_A_ fd);
		751	}
		752
		753	/* called on ENOMEM in select/poll to kill some fds and retry */
		754	static void noinline
		755	fd_enomem (EV_P)
		756	{
		757	int fd;
		758
		759	for (fd = anfdmax; fd--; )
		760	if (anfds [fd].events)
268	{	761	{
269	ev_io_stop (anfds [fd].head);	762	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	763	return;
271	}	764	}
		765	}
		766
		767	/* usually called after fork if backend needs to re-arm all fds from scratch */
		768	static void noinline
		769	fd_rearm_all (EV_P)
		770	{
		771	int fd;
		772
		773	for (fd = 0; fd < anfdmax; ++fd)
		774	if (anfds [fd].events)
		775	{
		776	anfds [fd].events = 0;
		777	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		778	}
272	}	779	}
273		780
274	/*****************************************************************************/	781	/*****************************************************************************/
275		782
276	static struct ev_timer **timers;	783	/*
277	static int timermax, timercnt;	784	* the heap functions want a real array index. array index 0 uis guaranteed to not
		785	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		786	* the branching factor of the d-tree.
		787	*/
278		788
279	static struct ev_periodic **periodics;	789	/*
280	static int periodicmax, periodiccnt;	790	* at the moment we allow libev the luxury of two heaps,
		791	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		792	* which is more cache-efficient.
		793	* the difference is about 5% with 50000+ watchers.
		794	*/
		795	#define EV_USE_4HEAP !EV_MINIMAL
		796	#if EV_USE_4HEAP
281		797
282	static void	798	#define DHEAP 4
283	upheap (WT *timers, int k)	799	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
284	{
285	WT w = timers [k];
286		800
287	while (k && timers [k >> 1]->at > w->at)	801	/* towards the root */
288	{	802	void inline_speed
289	timers [k] = timers [k >> 1];	803	upheap (ANHE *heap, int k)
290	timers [k]->active = k + 1;	804	{
291	k >>= 1;	805	ANHE he = heap [k];
		806
		807	for (;;)
292	}	808	{
		809	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
293		810
294	timers [k] = w;	811	if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
295	timers [k]->active = k + 1;
296
297	}
298
299	static void
300	downheap (WT *timers, int N, int k)
301	{
302	WT w = timers [k];
303
304	while (k < (N >> 1))
305	{
306	int j = k << 1;
307
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
309	++j;
310
311	if (w->at <= timers [j]->at)
312	break;	812	break;
313		813
314	timers [k] = timers [j];	814	heap [k] = heap [p];
315	timers [k]->active = k + 1;	815	ev_active (ANHE_w (heap [k])) = k;
316	k = j;	816	k = p;
		817	}
		818
		819	ev_active (ANHE_w (he)) = k;
		820	heap [k] = he;
		821	}
		822
		823	/* away from the root */
		824	void inline_speed
		825	downheap (ANHE *heap, int N, int k)
		826	{
		827	ANHE he = heap [k];
		828	ANHE *E = heap + N + HEAP0;
		829
		830	for (;;)
317	}	831	{
		832	ev_tstamp minat;
		833	ANHE *minpos;
		834	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
318		835
		836	// find minimum child
		837	if (expect_true (pos + DHEAP - 1 < E))
		838	{
		839	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		840	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		841	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		842	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		843	}
		844	else if (pos < E)
		845	{
		846	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		847	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else
		852	break;
		853
		854	if (ANHE_at (he) <= minat)
		855	break;
		856
		857	ev_active (ANHE_w (*minpos)) = k;
		858	heap [k] = *minpos;
		859
		860	k = minpos - heap;
		861	}
		862
		863	ev_active (ANHE_w (he)) = k;
		864	heap [k] = he;
		865	}
		866
		867	#else // 4HEAP
		868
		869	#define HEAP0 1
		870
		871	/* towards the root */
		872	void inline_speed
		873	upheap (ANHE *heap, int k)
		874	{
		875	ANHE he = heap [k];
		876
		877	for (;;)
		878	{
		879	int p = k >> 1;
		880
		881	/* maybe we could use a dummy element at heap [0]? */
		882	if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
		883	break;
		884
		885	heap [k] = heap [p];
		886	ev_active (ANHE_w (heap [k])) = k;
		887	k = p;
		888	}
		889
319	timers [k] = w;	890	heap [k] = w;
320	timers [k]->active = k + 1;	891	ev_active (ANHE_w (heap [k])) = k;
		892	}
		893
		894	/* away from the root */
		895	void inline_speed
		896	downheap (ANHE *heap, int N, int k)
		897	{
		898	ANHE he = heap [k];
		899
		900	for (;;)
		901	{
		902	int c = k << 1;
		903
		904	if (c > N)
		905	break;
		906
		907	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		908	? 1 : 0;
		909
		910	if (w->at <= ANHE_at (heap [c]))
		911	break;
		912
		913	heap [k] = heap [c];
		914	ev_active (ANHE_w (heap [k])) = k;
		915
		916	k = c;
		917	}
		918
		919	heap [k] = he;
		920	ev_active (ANHE_w (he)) = k;
		921	}
		922	#endif
		923
		924	void inline_size
		925	adjustheap (ANHE *heap, int N, int k)
		926	{
		927	upheap (heap, k);
		928	downheap (heap, N, k);
321	}	929	}
322		930
323	/*****************************************************************************/	931	/*****************************************************************************/
324		932
325	typedef struct	933	typedef struct
326	{	934	{
327	struct ev_signal *head;	935	WL head;
328	sig_atomic_t volatile gotsig;	936	EV_ATOMIC_T gotsig;
329	} ANSIG;	937	} ANSIG;
330		938
331	static ANSIG *signals;	939	static ANSIG *signals;
332	static int signalmax;	940	static int signalmax;
333		941
334	static int sigpipe [2];	942	static EV_ATOMIC_T gotsig;
335	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;
337		943
338	static void	944	void inline_size
339	signals_init (ANSIG *base, int count)	945	signals_init (ANSIG *base, int count)
340	{	946	{
341	while (count--)	947	while (count--)
342	{	948	{
343	base->head = 0;	949	base->head = 0;
…		…
345		951
346	++base;	952	++base;
347	}	953	}
348	}	954	}
349		955
		956	/*****************************************************************************/
		957
		958	void inline_speed
		959	fd_intern (int fd)
		960	{
		961	#ifdef _WIN32
		962	int arg = 1;
		963	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		964	#else
		965	fcntl (fd, F_SETFD, FD_CLOEXEC);
		966	fcntl (fd, F_SETFL, O_NONBLOCK);
		967	#endif
		968	}
		969
		970	static void noinline
		971	evpipe_init (EV_P)
		972	{
		973	if (!ev_is_active (&pipeev))
		974	{
		975	#if EV_USE_EVENTFD
		976	if ((evfd = eventfd (0, 0)) >= 0)
		977	{
		978	evpipe [0] = -1;
		979	fd_intern (evfd);
		980	ev_io_set (&pipeev, evfd, EV_READ);
		981	}
		982	else
		983	#endif
		984	{
		985	while (pipe (evpipe))
		986	syserr ("(libev) error creating signal/async pipe");
		987
		988	fd_intern (evpipe [0]);
		989	fd_intern (evpipe [1]);
		990	ev_io_set (&pipeev, evpipe [0], EV_READ);
		991	}
		992
		993	ev_io_start (EV_A_ &pipeev);
		994	ev_unref (EV_A); /* watcher should not keep loop alive */
		995	}
		996	}
		997
		998	void inline_size
		999	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1000	{
		1001	if (!*flag)
		1002	{
		1003	int old_errno = errno; /* save errno because write might clobber it */
		1004
		1005	*flag = 1;
		1006
		1007	#if EV_USE_EVENTFD
		1008	if (evfd >= 0)
		1009	{
		1010	uint64_t counter = 1;
		1011	write (evfd, &counter, sizeof (uint64_t));
		1012	}
		1013	else
		1014	#endif
		1015	write (evpipe [1], &old_errno, 1);
		1016
		1017	errno = old_errno;
		1018	}
		1019	}
		1020
350	static void	1021	static void
		1022	pipecb (EV_P_ ev_io *iow, int revents)
		1023	{
		1024	#if EV_USE_EVENTFD
		1025	if (evfd >= 0)
		1026	{
		1027	uint64_t counter;
		1028	read (evfd, &counter, sizeof (uint64_t));
		1029	}
		1030	else
		1031	#endif
		1032	{
		1033	char dummy;
		1034	read (evpipe [0], &dummy, 1);
		1035	}
		1036
		1037	if (gotsig && ev_is_default_loop (EV_A))
		1038	{
		1039	int signum;
		1040	gotsig = 0;
		1041
		1042	for (signum = signalmax; signum--; )
		1043	if (signals [signum].gotsig)
		1044	ev_feed_signal_event (EV_A_ signum + 1);
		1045	}
		1046
		1047	#if EV_ASYNC_ENABLE
		1048	if (gotasync)
		1049	{
		1050	int i;
		1051	gotasync = 0;
		1052
		1053	for (i = asynccnt; i--; )
		1054	if (asyncs [i]->sent)
		1055	{
		1056	asyncs [i]->sent = 0;
		1057	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1058	}
		1059	}
		1060	#endif
		1061	}
		1062
		1063	/*****************************************************************************/
		1064
		1065	static void
351	sighandler (int signum)	1066	ev_sighandler (int signum)
352	{	1067	{
		1068	#if EV_MULTIPLICITY
		1069	struct ev_loop *loop = &default_loop_struct;
		1070	#endif
		1071
		1072	#if _WIN32
		1073	signal (signum, ev_sighandler);
		1074	#endif
		1075
353	signals [signum - 1].gotsig = 1;	1076	signals [signum - 1].gotsig = 1;
354		1077	evpipe_write (EV_A_ &gotsig);
355	if (!gotsig)
356	{
357	gotsig = 1;
358	write (sigpipe [1], &signum, 1);
359	}
360	}	1078	}
361		1079
362	static void	1080	void noinline
363	sigcb (struct ev_io *iow, int revents)	1081	ev_feed_signal_event (EV_P_ int signum)
364	{	1082	{
365	struct ev_signal *w;	1083	WL w;
366	int sig;
367		1084
368	read (sigpipe [0], &revents, 1);	1085	#if EV_MULTIPLICITY
369	gotsig = 0;	1086	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1087	#endif
370		1088
371	for (sig = signalmax; sig--; )	1089	--signum;
372	if (signals [sig].gotsig)	1090
373	{	1091	if (signum < 0 || signum >= signalmax)
		1092	return;
		1093
374	signals [sig].gotsig = 0;	1094	signals [signum].gotsig = 0;
375		1095
376	for (w = signals [sig].head; w; w = w->next)	1096	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	1097	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
378	}
379	}
380
381	static void
382	siginit (void)
383	{
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
390
391	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);
393	}	1098	}
394		1099
395	/*****************************************************************************/	1100	/*****************************************************************************/
396		1101
397	static struct ev_idle **idles;	1102	static WL childs [EV_PID_HASHSIZE];
398	static int idlemax, idlecnt;
399		1103
400	static struct ev_prepare **prepares;	1104	#ifndef _WIN32
401	static int preparemax, preparecnt;
402		1105
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;	1106	static ev_signal childev;
		1107
		1108	#ifndef WIFCONTINUED
		1109	# define WIFCONTINUED(status) 0
		1110	#endif
		1111
		1112	void inline_speed
		1113	child_reap (EV_P_ int chain, int pid, int status)
		1114	{
		1115	ev_child *w;
		1116	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1117
		1118	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1119	{
		1120	if ((w->pid == pid || !w->pid)
		1121	&& (!traced || (w->flags & 1)))
		1122	{
		1123	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1124	w->rpid = pid;
		1125	w->rstatus = status;
		1126	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1127	}
		1128	}
		1129	}
410		1130
411	#ifndef WCONTINUED	1131	#ifndef WCONTINUED
412	# define WCONTINUED 0	1132	# define WCONTINUED 0
413	#endif	1133	#endif
414		1134
415	static void	1135	static void
416	childcb (struct ev_signal *sw, int revents)	1136	childcb (EV_P_ ev_signal *sw, int revents)
417	{	1137	{
418	struct ev_child *w;
419	int pid, status;	1138	int pid, status;
420		1139
		1140	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	1141	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	1142	if (!WCONTINUED
423	if (w->pid == pid || w->pid == -1)	1143	|| errno != EINVAL
424	{	1144	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
425	w->status = status;	1145	return;
426	event ((W)w, EV_CHILD);	1146
427	}	1147	/* make sure we are called again until all children have been reaped */
		1148	/* we need to do it this way so that the callback gets called before we continue */
		1149	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1150
		1151	child_reap (EV_A_ pid, pid, status);
		1152	if (EV_PID_HASHSIZE > 1)
		1153	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
428	}	1154	}
		1155
		1156	#endif
429		1157
430	/*****************************************************************************/	1158	/*****************************************************************************/
431		1159
		1160	#if EV_USE_PORT
		1161	# include "ev_port.c"
		1162	#endif
		1163	#if EV_USE_KQUEUE
		1164	# include "ev_kqueue.c"
		1165	#endif
432	#if EV_USE_EPOLL	1166	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	1167	# include "ev_epoll.c"
434	#endif	1168	#endif
		1169	#if EV_USE_POLL
		1170	# include "ev_poll.c"
		1171	#endif
435	#if EV_USE_SELECT	1172	#if EV_USE_SELECT
436	# include "ev_select.c"	1173	# include "ev_select.c"
437	#endif	1174	#endif
438		1175
439	int	1176	int
…		…
446	ev_version_minor (void)	1183	ev_version_minor (void)
447	{	1184	{
448	return EV_VERSION_MINOR;	1185	return EV_VERSION_MINOR;
449	}	1186	}
450		1187
451	int ev_init (int flags)	1188	/* return true if we are running with elevated privileges and should ignore env variables */
		1189	int inline_size
		1190	enable_secure (void)
452	{	1191	{
453	if (!ev_method)	1192	#ifdef _WIN32
		1193	return 0;
		1194	#else
		1195	return getuid () != geteuid ()
		1196	|| getgid () != getegid ();
		1197	#endif
		1198	}
		1199
		1200	unsigned int
		1201	ev_supported_backends (void)
		1202	{
		1203	unsigned int flags = 0;
		1204
		1205	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1206	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1207	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1208	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1209	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1210
		1211	return flags;
		1212	}
		1213
		1214	unsigned int
		1215	ev_recommended_backends (void)
		1216	{
		1217	unsigned int flags = ev_supported_backends ();
		1218
		1219	#ifndef __NetBSD__
		1220	/* kqueue is borked on everything but netbsd apparently */
		1221	/* it usually doesn't work correctly on anything but sockets and pipes */
		1222	flags &= ~EVBACKEND_KQUEUE;
		1223	#endif
		1224	#ifdef __APPLE__
		1225	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1226	flags &= ~EVBACKEND_POLL;
		1227	#endif
		1228
		1229	return flags;
		1230	}
		1231
		1232	unsigned int
		1233	ev_embeddable_backends (void)
		1234	{
		1235	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1236
		1237	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1238	/* please fix it and tell me how to detect the fix */
		1239	flags &= ~EVBACKEND_EPOLL;
		1240
		1241	return flags;
		1242	}
		1243
		1244	unsigned int
		1245	ev_backend (EV_P)
		1246	{
		1247	return backend;
		1248	}
		1249
		1250	unsigned int
		1251	ev_loop_count (EV_P)
		1252	{
		1253	return loop_count;
		1254	}
		1255
		1256	void
		1257	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1258	{
		1259	io_blocktime = interval;
		1260	}
		1261
		1262	void
		1263	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1264	{
		1265	timeout_blocktime = interval;
		1266	}
		1267
		1268	static void noinline
		1269	loop_init (EV_P_ unsigned int flags)
		1270	{
		1271	if (!backend)
454	{	1272	{
455	#if EV_USE_MONOTONIC	1273	#if EV_USE_MONOTONIC
456	{	1274	{
457	struct timespec ts;	1275	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1276	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	1277	have_monotonic = 1;
460	}	1278	}
461	#endif	1279	#endif
462		1280
463	ev_now = ev_time ();	1281	ev_rt_now = ev_time ();
464	now = get_clock ();	1282	mn_now = get_clock ();
		1283	now_floor = mn_now;
465	diff = ev_now - now;	1284	rtmn_diff = ev_rt_now - mn_now;
466		1285
467	if (pipe (sigpipe))	1286	io_blocktime = 0.;
468	return 0;	1287	timeout_blocktime = 0.;
		1288	backend = 0;
		1289	backend_fd = -1;
		1290	gotasync = 0;
		1291	#if EV_USE_INOTIFY
		1292	fs_fd = -2;
		1293	#endif
469		1294
470	ev_method = EVMETHOD_NONE;	1295	/* pid check not overridable via env */
		1296	#ifndef _WIN32
		1297	if (flags & EVFLAG_FORKCHECK)
		1298	curpid = getpid ();
		1299	#endif
		1300
		1301	if (!(flags & EVFLAG_NOENV)
		1302	&& !enable_secure ()
		1303	&& getenv ("LIBEV_FLAGS"))
		1304	flags = atoi (getenv ("LIBEV_FLAGS"));
		1305
		1306	if (!(flags & 0x0000ffffU))
		1307	flags |= ev_recommended_backends ();
		1308
		1309	#if EV_USE_PORT
		1310	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1311	#endif
		1312	#if EV_USE_KQUEUE
		1313	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1314	#endif
471	#if EV_USE_EPOLL	1315	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1316	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1317	#endif
		1318	#if EV_USE_POLL
		1319	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
473	#endif	1320	#endif
474	#if EV_USE_SELECT	1321	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	1322	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
476	#endif	1323	#endif
477		1324
478	if (ev_method)	1325	ev_init (&pipeev, pipecb);
		1326	ev_set_priority (&pipeev, EV_MAXPRI);
		1327	}
		1328	}
		1329
		1330	static void noinline
		1331	loop_destroy (EV_P)
		1332	{
		1333	int i;
		1334
		1335	if (ev_is_active (&pipeev))
		1336	{
		1337	ev_ref (EV_A); /* signal watcher */
		1338	ev_io_stop (EV_A_ &pipeev);
		1339
		1340	#if EV_USE_EVENTFD
		1341	if (evfd >= 0)
		1342	close (evfd);
		1343	#endif
		1344
		1345	if (evpipe [0] >= 0)
479	{	1346	{
480	ev_watcher_init (&sigev, sigcb);	1347	close (evpipe [0]);
481	siginit ();	1348	close (evpipe [1]);
		1349	}
		1350	}
482		1351
		1352	#if EV_USE_INOTIFY
		1353	if (fs_fd >= 0)
		1354	close (fs_fd);
		1355	#endif
		1356
		1357	if (backend_fd >= 0)
		1358	close (backend_fd);
		1359
		1360	#if EV_USE_PORT
		1361	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1362	#endif
		1363	#if EV_USE_KQUEUE
		1364	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1365	#endif
		1366	#if EV_USE_EPOLL
		1367	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1368	#endif
		1369	#if EV_USE_POLL
		1370	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1371	#endif
		1372	#if EV_USE_SELECT
		1373	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1374	#endif
		1375
		1376	for (i = NUMPRI; i--; )
		1377	{
		1378	array_free (pending, [i]);
		1379	#if EV_IDLE_ENABLE
		1380	array_free (idle, [i]);
		1381	#endif
		1382	}
		1383
		1384	ev_free (anfds); anfdmax = 0;
		1385
		1386	/* have to use the microsoft-never-gets-it-right macro */
		1387	array_free (fdchange, EMPTY);
		1388	array_free (timer, EMPTY);
		1389	#if EV_PERIODIC_ENABLE
		1390	array_free (periodic, EMPTY);
		1391	#endif
		1392	#if EV_FORK_ENABLE
		1393	array_free (fork, EMPTY);
		1394	#endif
		1395	array_free (prepare, EMPTY);
		1396	array_free (check, EMPTY);
		1397	#if EV_ASYNC_ENABLE
		1398	array_free (async, EMPTY);
		1399	#endif
		1400
		1401	backend = 0;
		1402	}
		1403
		1404	#if EV_USE_INOTIFY
		1405	void inline_size infy_fork (EV_P);
		1406	#endif
		1407
		1408	void inline_size
		1409	loop_fork (EV_P)
		1410	{
		1411	#if EV_USE_PORT
		1412	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1413	#endif
		1414	#if EV_USE_KQUEUE
		1415	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1416	#endif
		1417	#if EV_USE_EPOLL
		1418	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1419	#endif
		1420	#if EV_USE_INOTIFY
		1421	infy_fork (EV_A);
		1422	#endif
		1423
		1424	if (ev_is_active (&pipeev))
		1425	{
		1426	/* this "locks" the handlers against writing to the pipe */
		1427	/* while we modify the fd vars */
		1428	gotsig = 1;
		1429	#if EV_ASYNC_ENABLE
		1430	gotasync = 1;
		1431	#endif
		1432
		1433	ev_ref (EV_A);
		1434	ev_io_stop (EV_A_ &pipeev);
		1435
		1436	#if EV_USE_EVENTFD
		1437	if (evfd >= 0)
		1438	close (evfd);
		1439	#endif
		1440
		1441	if (evpipe [0] >= 0)
		1442	{
		1443	close (evpipe [0]);
		1444	close (evpipe [1]);
		1445	}
		1446
		1447	evpipe_init (EV_A);
		1448	/* now iterate over everything, in case we missed something */
		1449	pipecb (EV_A_ &pipeev, EV_READ);
		1450	}
		1451
		1452	postfork = 0;
		1453	}
		1454
		1455	#if EV_MULTIPLICITY
		1456	struct ev_loop *
		1457	ev_loop_new (unsigned int flags)
		1458	{
		1459	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1460
		1461	memset (loop, 0, sizeof (struct ev_loop));
		1462
		1463	loop_init (EV_A_ flags);
		1464
		1465	if (ev_backend (EV_A))
		1466	return loop;
		1467
		1468	return 0;
		1469	}
		1470
		1471	void
		1472	ev_loop_destroy (EV_P)
		1473	{
		1474	loop_destroy (EV_A);
		1475	ev_free (loop);
		1476	}
		1477
		1478	void
		1479	ev_loop_fork (EV_P)
		1480	{
		1481	postfork = 1; /* must be in line with ev_default_fork */
		1482	}
		1483	#endif
		1484
		1485	#if EV_MULTIPLICITY
		1486	struct ev_loop *
		1487	ev_default_loop_init (unsigned int flags)
		1488	#else
		1489	int
		1490	ev_default_loop (unsigned int flags)
		1491	#endif
		1492	{
		1493	if (!ev_default_loop_ptr)
		1494	{
		1495	#if EV_MULTIPLICITY
		1496	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1497	#else
		1498	ev_default_loop_ptr = 1;
		1499	#endif
		1500
		1501	loop_init (EV_A_ flags);
		1502
		1503	if (ev_backend (EV_A))
		1504	{
		1505	#ifndef _WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	1506	ev_signal_init (&childev, childcb, SIGCHLD);
		1507	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	1508	ev_signal_start (EV_A_ &childev);
		1509	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1510	#endif
485	}	1511	}
		1512	else
		1513	ev_default_loop_ptr = 0;
486	}	1514	}
487		1515
488	return ev_method;	1516	return ev_default_loop_ptr;
		1517	}
		1518
		1519	void
		1520	ev_default_destroy (void)
		1521	{
		1522	#if EV_MULTIPLICITY
		1523	struct ev_loop *loop = ev_default_loop_ptr;
		1524	#endif
		1525
		1526	#ifndef _WIN32
		1527	ev_ref (EV_A); /* child watcher */
		1528	ev_signal_stop (EV_A_ &childev);
		1529	#endif
		1530
		1531	loop_destroy (EV_A);
		1532	}
		1533
		1534	void
		1535	ev_default_fork (void)
		1536	{
		1537	#if EV_MULTIPLICITY
		1538	struct ev_loop *loop = ev_default_loop_ptr;
		1539	#endif
		1540
		1541	if (backend)
		1542	postfork = 1; /* must be in line with ev_loop_fork */
489	}	1543	}
490		1544
491	/*****************************************************************************/	1545	/*****************************************************************************/
492		1546
493	void	1547	void
494	ev_prefork (void)	1548	ev_invoke (EV_P_ void *w, int revents)
495	{	1549	{
496	/* nop */	1550	EV_CB_INVOKE ((W)w, revents);
497	}	1551	}
498		1552
499	void	1553	void inline_speed
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void
523	call_pending (void)	1554	call_pending (EV_P)
524	{	1555	{
		1556	int pri;
		1557
		1558	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	1559	while (pendingcnt [pri])
526	{	1560	{
527	ANPENDING *p = pendings + --pendingcnt;	1561	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		1562
529	if (p->w)	1563	if (expect_true (p->w))
		1564	{
		1565	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1566
		1567	p->w->pending = 0;
		1568	EV_CB_INVOKE (p->w, p->events);
		1569	}
		1570	}
		1571	}
		1572
		1573	#if EV_IDLE_ENABLE
		1574	void inline_size
		1575	idle_reify (EV_P)
		1576	{
		1577	if (expect_false (idleall))
		1578	{
		1579	int pri;
		1580
		1581	for (pri = NUMPRI; pri--; )
530	{	1582	{
531	p->w->pending = 0;	1583	if (pendingcnt [pri])
532	p->w->cb (p->w, p->events);	1584	break;
		1585
		1586	if (idlecnt [pri])
		1587	{
		1588	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1589	break;
		1590	}
533	}	1591	}
534	}	1592	}
535	}	1593	}
		1594	#endif
536		1595
537	static void	1596	void inline_size
538	timers_reify (void)	1597	timers_reify (EV_P)
539	{	1598	{
540	while (timercnt && timers [0]->at <= now)	1599	while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
541	{	1600	{
542	struct ev_timer *w = timers [0];	1601	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
		1602
		1603	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
543		1604
544	/* first reschedule or stop timer */	1605	/* first reschedule or stop timer */
545	if (w->repeat)	1606	if (w->repeat)
546	{	1607	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1608	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	1609
		1610	ev_at (w) += w->repeat;
		1611	if (ev_at (w) < mn_now)
		1612	ev_at (w) = mn_now;
		1613
549	downheap ((WT *)timers, timercnt, 0);	1614	downheap (timers, timercnt, HEAP0);
550	}	1615	}
551	else	1616	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	1617	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		1618
554	event ((W)w, EV_TIMEOUT);	1619	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
555	}	1620	}
556	}	1621	}
557		1622
558	static void	1623	#if EV_PERIODIC_ENABLE
		1624	void inline_size
559	periodics_reify (void)	1625	periodics_reify (EV_P)
560	{	1626	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	1627	while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
562	{	1628	{
563	struct ev_periodic *w = periodics [0];	1629	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
		1630
		1631	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
564		1632
565	/* first reschedule or stop timer */	1633	/* first reschedule or stop timer */
566	if (w->interval)	1634	if (w->reschedule_cb)
567	{	1635	{
		1636	ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1637	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
		1638	downheap (periodics, periodiccnt, 1);
		1639	}
		1640	else if (w->interval)
		1641	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1642	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1643	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1644	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	1645	downheap (periodics, periodiccnt, HEAP0);
571	}	1646	}
572	else	1647	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	1648	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		1649
575	event ((W)w, EV_PERIODIC);	1650	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
576	}	1651	}
577	}	1652	}
578		1653
579	static void	1654	static void noinline
580	periodics_reschedule (ev_tstamp diff)	1655	periodics_reschedule (EV_P)
581	{	1656	{
582	int i;	1657	int i;
583		1658
584	/* adjust periodics after time jump */	1659	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	1660	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
586	{	1661	{
587	struct ev_periodic *w = periodics [i];	1662	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
588		1663
		1664	if (w->reschedule_cb)
		1665	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
589	if (w->interval)	1666	else if (w->interval)
		1667	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1668	}
		1669
		1670	/* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
		1671	for (i = periodiccnt >> 1; --i; )
		1672	downheap (periodics, periodiccnt, i + HEAP0);
		1673	}
		1674	#endif
		1675
		1676	void inline_speed
		1677	time_update (EV_P_ ev_tstamp max_block)
		1678	{
		1679	int i;
		1680
		1681	#if EV_USE_MONOTONIC
		1682	if (expect_true (have_monotonic))
		1683	{
		1684	ev_tstamp odiff = rtmn_diff;
		1685
		1686	mn_now = get_clock ();
		1687
		1688	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1689	/* interpolate in the meantime */
		1690	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
590	{	1691	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1692	ev_rt_now = rtmn_diff + mn_now;
		1693	return;
		1694	}
592		1695
593	if (fabs (diff) >= 1e-4)	1696	now_floor = mn_now;
		1697	ev_rt_now = ev_time ();
		1698
		1699	/* loop a few times, before making important decisions.
		1700	* on the choice of "4": one iteration isn't enough,
		1701	* in case we get preempted during the calls to
		1702	* ev_time and get_clock. a second call is almost guaranteed
		1703	* to succeed in that case, though. and looping a few more times
		1704	* doesn't hurt either as we only do this on time-jumps or
		1705	* in the unlikely event of having been preempted here.
		1706	*/
		1707	for (i = 4; --i; )
		1708	{
		1709	rtmn_diff = ev_rt_now - mn_now;
		1710
		1711	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1712	return; /* all is well */
		1713
		1714	ev_rt_now = ev_time ();
		1715	mn_now = get_clock ();
		1716	now_floor = mn_now;
		1717	}
		1718
		1719	# if EV_PERIODIC_ENABLE
		1720	periodics_reschedule (EV_A);
		1721	# endif
		1722	/* no timer adjustment, as the monotonic clock doesn't jump */
		1723	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1724	}
		1725	else
		1726	#endif
		1727	{
		1728	ev_rt_now = ev_time ();
		1729
		1730	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1731	{
		1732	#if EV_PERIODIC_ENABLE
		1733	periodics_reschedule (EV_A);
		1734	#endif
		1735	/* adjust timers. this is easy, as the offset is the same for all of them */
		1736	for (i = 0; i < timercnt; ++i)
594	{	1737	{
595	ev_periodic_stop (w);	1738	ANHE *he = timers + i + HEAP0;
596	ev_periodic_start (w);	1739	ANHE_w (*he)->at += ev_rt_now - mn_now;
597		1740	ANHE_at_set (*he);
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	1741	}
600	}	1742	}
601	}
602	}
603		1743
604	static void	1744	mn_now = ev_rt_now;
605	time_update (void)
606	{
607	int i;
608
609	ev_now = ev_time ();
610
611	if (have_monotonic)
612	{	1745	}
613	ev_tstamp odiff = diff;	1746	}
614		1747
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1748	void
		1749	ev_ref (EV_P)
		1750	{
		1751	++activecnt;
		1752	}
		1753
		1754	void
		1755	ev_unref (EV_P)
		1756	{
		1757	--activecnt;
		1758	}
		1759
		1760	static int loop_done;
		1761
		1762	void
		1763	ev_loop (EV_P_ int flags)
		1764	{
		1765	loop_done = EVUNLOOP_CANCEL;
		1766
		1767	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1768
		1769	do
		1770	{
		1771	#ifndef _WIN32
		1772	if (expect_false (curpid)) /* penalise the forking check even more */
		1773	if (expect_false (getpid () != curpid))
		1774	{
		1775	curpid = getpid ();
		1776	postfork = 1;
		1777	}
		1778	#endif
		1779
		1780	#if EV_FORK_ENABLE
		1781	/* we might have forked, so queue fork handlers */
		1782	if (expect_false (postfork))
		1783	if (forkcnt)
		1784	{
		1785	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1786	call_pending (EV_A);
		1787	}
		1788	#endif
		1789
		1790	/* queue prepare watchers (and execute them) */
		1791	if (expect_false (preparecnt))
616	{	1792	{
617	now = get_clock ();	1793	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
618	diff = ev_now - now;	1794	call_pending (EV_A);
619
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)
621	return; /* all is well */
622
623	ev_now = ev_time ();
624	}	1795	}
625		1796
626	periodics_reschedule (diff - odiff);	1797	if (expect_false (!activecnt))
627	/* no timer adjustment, as the monotonic clock doesn't jump */	1798	break;
628	}
629	else
630	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
632	{
633	periodics_reschedule (ev_now - now);
634		1799
635	/* adjust timers. this is easy, as the offset is the same for all */	1800	/* we might have forked, so reify kernel state if necessary */
636	for (i = 0; i < timercnt; ++i)	1801	if (expect_false (postfork))
637	timers [i]->at += diff;	1802	loop_fork (EV_A);
638	}
639
640	now = ev_now;
641	}
642	}
643
644	int ev_loop_done;
645
646	void ev_loop (int flags)
647	{
648	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650
651	do
652	{
653	/* queue check watchers (and execute them) */
654	if (preparecnt)
655	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();
658	}
659		1803
660	/* update fd-related kernel structures */	1804	/* update fd-related kernel structures */
661	fd_reify ();	1805	fd_reify (EV_A);
662		1806
663	/* calculate blocking time */	1807	/* calculate blocking time */
		1808	{
		1809	ev_tstamp waittime = 0.;
		1810	ev_tstamp sleeptime = 0.;
664		1811
665	/* we only need this for !monotonic clockor timers, but as we basically	1812	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
666	always have timers, we just calculate it always */
667	ev_now = ev_time ();
668
669	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;
671	else
672	{	1813	{
		1814	/* update time to cancel out callback processing overhead */
		1815	time_update (EV_A_ 1e100);
		1816
673	block = MAX_BLOCKTIME;	1817	waittime = MAX_BLOCKTIME;
674		1818
675	if (timercnt)	1819	if (timercnt)
676	{	1820	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1821	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
678	if (block > to) block = to;	1822	if (waittime > to) waittime = to;
679	}	1823	}
680		1824
		1825	#if EV_PERIODIC_ENABLE
681	if (periodiccnt)	1826	if (periodiccnt)
682	{	1827	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1828	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
684	if (block > to) block = to;	1829	if (waittime > to) waittime = to;
685	}	1830	}
		1831	#endif
686		1832
687	if (block < 0.) block = 0.;	1833	if (expect_false (waittime < timeout_blocktime))
		1834	waittime = timeout_blocktime;
		1835
		1836	sleeptime = waittime - backend_fudge;
		1837
		1838	if (expect_true (sleeptime > io_blocktime))
		1839	sleeptime = io_blocktime;
		1840
		1841	if (sleeptime)
		1842	{
		1843	ev_sleep (sleeptime);
		1844	waittime -= sleeptime;
		1845	}
688	}	1846	}
689		1847
690	method_poll (block);	1848	++loop_count;
		1849	backend_poll (EV_A_ waittime);
691		1850
692	/* update ev_now, do magic */	1851	/* update ev_rt_now, do magic */
693	time_update ();	1852	time_update (EV_A_ waittime + sleeptime);
		1853	}
694		1854
695	/* queue pending timers and reschedule them */	1855	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1856	timers_reify (EV_A); /* relative timers called last */
		1857	#if EV_PERIODIC_ENABLE
697	periodics_reify (); /* absolute timers called first */	1858	periodics_reify (EV_A); /* absolute timers called first */
		1859	#endif
698		1860
		1861	#if EV_IDLE_ENABLE
699	/* queue idle watchers unless io or timers are pending */	1862	/* queue idle watchers unless other events are pending */
700	if (!pendingcnt)	1863	idle_reify (EV_A);
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1864	#endif
702		1865
703	/* queue check watchers, to be executed first */	1866	/* queue check watchers, to be executed first */
704	if (checkcnt)	1867	if (expect_false (checkcnt))
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1868	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1869
707	call_pending ();	1870	call_pending (EV_A);
708	}	1871	}
709	while (!ev_loop_done);	1872	while (expect_true (
		1873	activecnt
		1874	&& !loop_done
		1875	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1876	));
710		1877
711	if (ev_loop_done != 2)	1878	if (loop_done == EVUNLOOP_ONE)
		1879	loop_done = EVUNLOOP_CANCEL;
		1880	}
		1881
		1882	void
		1883	ev_unloop (EV_P_ int how)
		1884	{
712	ev_loop_done = 0;	1885	loop_done = how;
713	}	1886	}
714		1887
715	/*****************************************************************************/	1888	/*****************************************************************************/
716		1889
717	static void	1890	void inline_size
718	wlist_add (WL *head, WL elem)	1891	wlist_add (WL *head, WL elem)
719	{	1892	{
720	elem->next = *head;	1893	elem->next = *head;
721	*head = elem;	1894	*head = elem;
722	}	1895	}
723		1896
724	static void	1897	void inline_size
725	wlist_del (WL *head, WL elem)	1898	wlist_del (WL *head, WL elem)
726	{	1899	{
727	while (*head)	1900	while (*head)
728	{	1901	{
729	if (*head == elem)	1902	if (*head == elem)
…		…
734		1907
735	head = &(*head)->next;	1908	head = &(*head)->next;
736	}	1909	}
737	}	1910	}
738		1911
739	static void	1912	void inline_speed
740	ev_clear_pending (W w)	1913	clear_pending (EV_P_ W w)
741	{	1914	{
742	if (w->pending)	1915	if (w->pending)
743	{	1916	{
744	pendings [w->pending - 1].w = 0;	1917	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1918	w->pending = 0;
746	}	1919	}
747	}	1920	}
748		1921
749	static void	1922	int
		1923	ev_clear_pending (EV_P_ void *w)
		1924	{
		1925	W w_ = (W)w;
		1926	int pending = w_->pending;
		1927
		1928	if (expect_true (pending))
		1929	{
		1930	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1931	w_->pending = 0;
		1932	p->w = 0;
		1933	return p->events;
		1934	}
		1935	else
		1936	return 0;
		1937	}
		1938
		1939	void inline_size
		1940	pri_adjust (EV_P_ W w)
		1941	{
		1942	int pri = w->priority;
		1943	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1944	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1945	w->priority = pri;
		1946	}
		1947
		1948	void inline_speed
750	ev_start (W w, int active)	1949	ev_start (EV_P_ W w, int active)
751	{	1950	{
		1951	pri_adjust (EV_A_ w);
752	w->active = active;	1952	w->active = active;
		1953	ev_ref (EV_A);
753	}	1954	}
754		1955
755	static void	1956	void inline_size
756	ev_stop (W w)	1957	ev_stop (EV_P_ W w)
757	{	1958	{
		1959	ev_unref (EV_A);
758	w->active = 0;	1960	w->active = 0;
759	}	1961	}
760		1962
761	/*****************************************************************************/	1963	/*****************************************************************************/
762		1964
763	void	1965	void noinline
764	ev_io_start (struct ev_io *w)	1966	ev_io_start (EV_P_ ev_io *w)
765	{	1967	{
		1968	int fd = w->fd;
		1969
766	if (ev_is_active (w))	1970	if (expect_false (ev_is_active (w)))
767	return;	1971	return;
768		1972
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1973	assert (("ev_io_start called with negative fd", fd >= 0));
772		1974
773	ev_start ((W)w, 1);	1975	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1976	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1977	wlist_add (&anfds[fd].head, (WL)w);
776		1978
777	fd_change (fd);	1979	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1980	w->events &= ~EV_IOFDSET;
778	}	1981	}
779		1982
780	void	1983	void noinline
781	ev_io_stop (struct ev_io *w)	1984	ev_io_stop (EV_P_ ev_io *w)
782	{	1985	{
783	ev_clear_pending ((W)w);	1986	clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1987	if (expect_false (!ev_is_active (w)))
785	return;	1988	return;
786		1989
		1990	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1991
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1992	wlist_del (&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1993	ev_stop (EV_A_ (W)w);
789		1994
790	fd_change (w->fd);	1995	fd_change (EV_A_ w->fd, 1);
791	}	1996	}
792		1997
793	void	1998	void noinline
794	ev_timer_start (struct ev_timer *w)	1999	ev_timer_start (EV_P_ ev_timer *w)
795	{	2000	{
796	if (ev_is_active (w))	2001	if (expect_false (ev_is_active (w)))
797	return;	2002	return;
798		2003
799	w->at += now;	2004	ev_at (w) += mn_now;
800		2005
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2006	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		2007
803	ev_start ((W)w, ++timercnt);	2008	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
804	array_needsize (timers, timermax, timercnt, );	2009	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
805	timers [timercnt - 1] = w;	2010	ANHE_w (timers [ev_active (w)]) = (WT)w;
806	upheap ((WT *)timers, timercnt - 1);	2011	ANHE_at_set (timers [ev_active (w)]);
807	}	2012	upheap (timers, ev_active (w));
808		2013
809	void	2014	/*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
		2015	}
		2016
		2017	void noinline
810	ev_timer_stop (struct ev_timer *w)	2018	ev_timer_stop (EV_P_ ev_timer *w)
811	{	2019	{
812	ev_clear_pending ((W)w);	2020	clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	2021	if (expect_false (!ev_is_active (w)))
814	return;	2022	return;
815		2023
816	if (w->active < timercnt--)	2024	{
		2025	int active = ev_active (w);
		2026
		2027	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2028
		2029	if (expect_true (active < timercnt + HEAP0 - 1))
817	{	2030	{
818	timers [w->active - 1] = timers [timercnt];	2031	timers [active] = timers [timercnt + HEAP0 - 1];
819	downheap ((WT *)timers, timercnt, w->active - 1);	2032	adjustheap (timers, timercnt, active);
820	}	2033	}
821		2034
822	w->at = w->repeat;	2035	--timercnt;
		2036	}
823		2037
		2038	ev_at (w) -= mn_now;
		2039
824	ev_stop ((W)w);	2040	ev_stop (EV_A_ (W)w);
825	}	2041	}
826		2042
827	void	2043	void noinline
828	ev_timer_again (struct ev_timer *w)	2044	ev_timer_again (EV_P_ ev_timer *w)
829	{	2045	{
830	if (ev_is_active (w))	2046	if (ev_is_active (w))
831	{	2047	{
832	if (w->repeat)	2048	if (w->repeat)
833	{	2049	{
834	w->at = now + w->repeat;	2050	ev_at (w) = mn_now + w->repeat;
		2051	ANHE_at_set (timers [ev_active (w)]);
835	downheap ((WT *)timers, timercnt, w->active - 1);	2052	adjustheap (timers, timercnt, ev_active (w));
836	}	2053	}
837	else	2054	else
838	ev_timer_stop (w);	2055	ev_timer_stop (EV_A_ w);
839	}	2056	}
840	else if (w->repeat)	2057	else if (w->repeat)
		2058	{
		2059	ev_at (w) = w->repeat;
841	ev_timer_start (w);	2060	ev_timer_start (EV_A_ w);
		2061	}
842	}	2062	}
843		2063
844	void	2064	#if EV_PERIODIC_ENABLE
		2065	void noinline
845	ev_periodic_start (struct ev_periodic *w)	2066	ev_periodic_start (EV_P_ ev_periodic *w)
846	{	2067	{
847	if (ev_is_active (w))	2068	if (expect_false (ev_is_active (w)))
848	return;	2069	return;
849		2070
		2071	if (w->reschedule_cb)
		2072	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2073	else if (w->interval)
		2074	{
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2075	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852	/* this formula differs from the one in periodic_reify because we do not always round up */	2076	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	2077	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2078	}
		2079	else
		2080	ev_at (w) = w->offset;
855		2081
856	ev_start ((W)w, ++periodiccnt);	2082	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
857	array_needsize (periodics, periodicmax, periodiccnt, );	2083	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
858	periodics [periodiccnt - 1] = w;	2084	ANHE_w (periodics [ev_active (w)]) = (WT)w;
859	upheap ((WT *)periodics, periodiccnt - 1);	2085	upheap (periodics, ev_active (w));
860	}
861		2086
862	void	2087	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
		2088	}
		2089
		2090	void noinline
863	ev_periodic_stop (struct ev_periodic *w)	2091	ev_periodic_stop (EV_P_ ev_periodic *w)
864	{	2092	{
865	ev_clear_pending ((W)w);	2093	clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	2094	if (expect_false (!ev_is_active (w)))
867	return;	2095	return;
868		2096
869	if (w->active < periodiccnt--)	2097	{
		2098	int active = ev_active (w);
		2099
		2100	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2101
		2102	if (expect_true (active < periodiccnt + HEAP0 - 1))
870	{	2103	{
871	periodics [w->active - 1] = periodics [periodiccnt];	2104	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	2105	adjustheap (periodics, periodiccnt, active);
873	}	2106	}
874		2107
		2108	--periodiccnt;
		2109	}
		2110
875	ev_stop ((W)w);	2111	ev_stop (EV_A_ (W)w);
876	}	2112	}
877		2113
878	void	2114	void noinline
		2115	ev_periodic_again (EV_P_ ev_periodic *w)
		2116	{
		2117	/* TODO: use adjustheap and recalculation */
		2118	ev_periodic_stop (EV_A_ w);
		2119	ev_periodic_start (EV_A_ w);
		2120	}
		2121	#endif
		2122
		2123	#ifndef SA_RESTART
		2124	# define SA_RESTART 0
		2125	#endif
		2126
		2127	void noinline
879	ev_signal_start (struct ev_signal *w)	2128	ev_signal_start (EV_P_ ev_signal *w)
880	{	2129	{
		2130	#if EV_MULTIPLICITY
		2131	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2132	#endif
881	if (ev_is_active (w))	2133	if (expect_false (ev_is_active (w)))
882	return;	2134	return;
883		2135
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2136	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		2137
886	ev_start ((W)w, 1);	2138	evpipe_init (EV_A);
		2139
		2140	{
		2141	#ifndef _WIN32
		2142	sigset_t full, prev;
		2143	sigfillset (&full);
		2144	sigprocmask (SIG_SETMASK, &full, &prev);
		2145	#endif
		2146
887	array_needsize (signals, signalmax, w->signum, signals_init);	2147	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2148
		2149	#ifndef _WIN32
		2150	sigprocmask (SIG_SETMASK, &prev, 0);
		2151	#endif
		2152	}
		2153
		2154	ev_start (EV_A_ (W)w, 1);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2155	wlist_add (&signals [w->signum - 1].head, (WL)w);
889		2156
890	if (!w->next)	2157	if (!((WL)w)->next)
891	{	2158	{
		2159	#if _WIN32
		2160	signal (w->signum, ev_sighandler);
		2161	#else
892	struct sigaction sa;	2162	struct sigaction sa;
893	sa.sa_handler = sighandler;	2163	sa.sa_handler = ev_sighandler;
894	sigfillset (&sa.sa_mask);	2164	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	2165	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	2166	sigaction (w->signum, &sa, 0);
		2167	#endif
897	}	2168	}
898	}	2169	}
899		2170
900	void	2171	void noinline
901	ev_signal_stop (struct ev_signal *w)	2172	ev_signal_stop (EV_P_ ev_signal *w)
902	{	2173	{
903	ev_clear_pending ((W)w);	2174	clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	2175	if (expect_false (!ev_is_active (w)))
905	return;	2176	return;
906		2177
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2178	wlist_del (&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	2179	ev_stop (EV_A_ (W)w);
909		2180
910	if (!signals [w->signum - 1].head)	2181	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	2182	signal (w->signum, SIG_DFL);
912	}	2183	}
913		2184
914	void	2185	void
915	ev_idle_start (struct ev_idle *w)	2186	ev_child_start (EV_P_ ev_child *w)
916	{	2187	{
		2188	#if EV_MULTIPLICITY
		2189	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2190	#endif
917	if (ev_is_active (w))	2191	if (expect_false (ev_is_active (w)))
918	return;	2192	return;
919		2193
920	ev_start ((W)w, ++idlecnt);	2194	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	2195	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	2196	}
924		2197
925	void	2198	void
926	ev_idle_stop (struct ev_idle *w)	2199	ev_child_stop (EV_P_ ev_child *w)
927	{	2200	{
928	ev_clear_pending ((W)w);	2201	clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	2202	if (expect_false (!ev_is_active (w)))
930	return;	2203	return;
931		2204
932	idles [w->active - 1] = idles [--idlecnt];	2205	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
933	ev_stop ((W)w);	2206	ev_stop (EV_A_ (W)w);
934	}	2207	}
935		2208
936	void	2209	#if EV_STAT_ENABLE
937	ev_prepare_start (struct ev_prepare *w)	2210
		2211	# ifdef _WIN32
		2212	# undef lstat
		2213	# define lstat(a,b) _stati64 (a,b)
		2214	# endif
		2215
		2216	#define DEF_STAT_INTERVAL 5.0074891
		2217	#define MIN_STAT_INTERVAL 0.1074891
		2218
		2219	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2220
		2221	#if EV_USE_INOTIFY
		2222	# define EV_INOTIFY_BUFSIZE 8192
		2223
		2224	static void noinline
		2225	infy_add (EV_P_ ev_stat *w)
938	{	2226	{
939	if (ev_is_active (w))	2227	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		2228
		2229	if (w->wd < 0)
		2230	{
		2231	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2232
		2233	/* monitor some parent directory for speedup hints */
		2234	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2235	/* but an efficiency issue only */
		2236	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2237	{
		2238	char path [4096];
		2239	strcpy (path, w->path);
		2240
		2241	do
		2242	{
		2243	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2244	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2245
		2246	char *pend = strrchr (path, '/');
		2247
		2248	if (!pend)
		2249	break; /* whoops, no '/', complain to your admin */
		2250
		2251	*pend = 0;
		2252	w->wd = inotify_add_watch (fs_fd, path, mask);
		2253	}
		2254	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2255	}
		2256	}
		2257	else
		2258	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2259
		2260	if (w->wd >= 0)
		2261	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2262	}
		2263
		2264	static void noinline
		2265	infy_del (EV_P_ ev_stat *w)
		2266	{
		2267	int slot;
		2268	int wd = w->wd;
		2269
		2270	if (wd < 0)
940	return;	2271	return;
941		2272
		2273	w->wd = -2;
		2274	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2275	wlist_del (&fs_hash [slot].head, (WL)w);
		2276
		2277	/* remove this watcher, if others are watching it, they will rearm */
		2278	inotify_rm_watch (fs_fd, wd);
		2279	}
		2280
		2281	static void noinline
		2282	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2283	{
		2284	if (slot < 0)
		2285	/* overflow, need to check for all hahs slots */
		2286	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2287	infy_wd (EV_A_ slot, wd, ev);
		2288	else
		2289	{
		2290	WL w_;
		2291
		2292	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2293	{
		2294	ev_stat *w = (ev_stat *)w_;
		2295	w_ = w_->next; /* lets us remove this watcher and all before it */
		2296
		2297	if (w->wd == wd || wd == -1)
		2298	{
		2299	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2300	{
		2301	w->wd = -1;
		2302	infy_add (EV_A_ w); /* re-add, no matter what */
		2303	}
		2304
		2305	stat_timer_cb (EV_A_ &w->timer, 0);
		2306	}
		2307	}
		2308	}
		2309	}
		2310
		2311	static void
		2312	infy_cb (EV_P_ ev_io *w, int revents)
		2313	{
		2314	char buf [EV_INOTIFY_BUFSIZE];
		2315	struct inotify_event *ev = (struct inotify_event *)buf;
		2316	int ofs;
		2317	int len = read (fs_fd, buf, sizeof (buf));
		2318
		2319	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2320	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2321	}
		2322
		2323	void inline_size
		2324	infy_init (EV_P)
		2325	{
		2326	if (fs_fd != -2)
		2327	return;
		2328
		2329	fs_fd = inotify_init ();
		2330
		2331	if (fs_fd >= 0)
		2332	{
		2333	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2334	ev_set_priority (&fs_w, EV_MAXPRI);
		2335	ev_io_start (EV_A_ &fs_w);
		2336	}
		2337	}
		2338
		2339	void inline_size
		2340	infy_fork (EV_P)
		2341	{
		2342	int slot;
		2343
		2344	if (fs_fd < 0)
		2345	return;
		2346
		2347	close (fs_fd);
		2348	fs_fd = inotify_init ();
		2349
		2350	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2351	{
		2352	WL w_ = fs_hash [slot].head;
		2353	fs_hash [slot].head = 0;
		2354
		2355	while (w_)
		2356	{
		2357	ev_stat *w = (ev_stat *)w_;
		2358	w_ = w_->next; /* lets us add this watcher */
		2359
		2360	w->wd = -1;
		2361
		2362	if (fs_fd >= 0)
		2363	infy_add (EV_A_ w); /* re-add, no matter what */
		2364	else
		2365	ev_timer_start (EV_A_ &w->timer);
		2366	}
		2367
		2368	}
		2369	}
		2370
		2371	#endif
		2372
		2373	void
		2374	ev_stat_stat (EV_P_ ev_stat *w)
		2375	{
		2376	if (lstat (w->path, &w->attr) < 0)
		2377	w->attr.st_nlink = 0;
		2378	else if (!w->attr.st_nlink)
		2379	w->attr.st_nlink = 1;
		2380	}
		2381
		2382	static void noinline
		2383	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2384	{
		2385	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2386
		2387	/* we copy this here each the time so that */
		2388	/* prev has the old value when the callback gets invoked */
		2389	w->prev = w->attr;
		2390	ev_stat_stat (EV_A_ w);
		2391
		2392	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2393	if (
		2394	w->prev.st_dev != w->attr.st_dev
		2395	|| w->prev.st_ino != w->attr.st_ino
		2396	|| w->prev.st_mode != w->attr.st_mode
		2397	|| w->prev.st_nlink != w->attr.st_nlink
		2398	|| w->prev.st_uid != w->attr.st_uid
		2399	|| w->prev.st_gid != w->attr.st_gid
		2400	|| w->prev.st_rdev != w->attr.st_rdev
		2401	|| w->prev.st_size != w->attr.st_size
		2402	|| w->prev.st_atime != w->attr.st_atime
		2403	|| w->prev.st_mtime != w->attr.st_mtime
		2404	|| w->prev.st_ctime != w->attr.st_ctime
		2405	) {
		2406	#if EV_USE_INOTIFY
		2407	infy_del (EV_A_ w);
		2408	infy_add (EV_A_ w);
		2409	ev_stat_stat (EV_A_ w); /* avoid race... */
		2410	#endif
		2411
		2412	ev_feed_event (EV_A_ w, EV_STAT);
		2413	}
		2414	}
		2415
		2416	void
		2417	ev_stat_start (EV_P_ ev_stat *w)
		2418	{
		2419	if (expect_false (ev_is_active (w)))
		2420	return;
		2421
		2422	/* since we use memcmp, we need to clear any padding data etc. */
		2423	memset (&w->prev, 0, sizeof (ev_statdata));
		2424	memset (&w->attr, 0, sizeof (ev_statdata));
		2425
		2426	ev_stat_stat (EV_A_ w);
		2427
		2428	if (w->interval < MIN_STAT_INTERVAL)
		2429	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2430
		2431	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2432	ev_set_priority (&w->timer, ev_priority (w));
		2433
		2434	#if EV_USE_INOTIFY
		2435	infy_init (EV_A);
		2436
		2437	if (fs_fd >= 0)
		2438	infy_add (EV_A_ w);
		2439	else
		2440	#endif
		2441	ev_timer_start (EV_A_ &w->timer);
		2442
		2443	ev_start (EV_A_ (W)w, 1);
		2444	}
		2445
		2446	void
		2447	ev_stat_stop (EV_P_ ev_stat *w)
		2448	{
		2449	clear_pending (EV_A_ (W)w);
		2450	if (expect_false (!ev_is_active (w)))
		2451	return;
		2452
		2453	#if EV_USE_INOTIFY
		2454	infy_del (EV_A_ w);
		2455	#endif
		2456	ev_timer_stop (EV_A_ &w->timer);
		2457
		2458	ev_stop (EV_A_ (W)w);
		2459	}
		2460	#endif
		2461
		2462	#if EV_IDLE_ENABLE
		2463	void
		2464	ev_idle_start (EV_P_ ev_idle *w)
		2465	{
		2466	if (expect_false (ev_is_active (w)))
		2467	return;
		2468
		2469	pri_adjust (EV_A_ (W)w);
		2470
		2471	{
		2472	int active = ++idlecnt [ABSPRI (w)];
		2473
		2474	++idleall;
		2475	ev_start (EV_A_ (W)w, active);
		2476
		2477	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2478	idles [ABSPRI (w)][active - 1] = w;
		2479	}
		2480	}
		2481
		2482	void
		2483	ev_idle_stop (EV_P_ ev_idle *w)
		2484	{
		2485	clear_pending (EV_A_ (W)w);
		2486	if (expect_false (!ev_is_active (w)))
		2487	return;
		2488
		2489	{
		2490	int active = ev_active (w);
		2491
		2492	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2493	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2494
		2495	ev_stop (EV_A_ (W)w);
		2496	--idleall;
		2497	}
		2498	}
		2499	#endif
		2500
		2501	void
		2502	ev_prepare_start (EV_P_ ev_prepare *w)
		2503	{
		2504	if (expect_false (ev_is_active (w)))
		2505	return;
		2506
942	ev_start ((W)w, ++preparecnt);	2507	ev_start (EV_A_ (W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );	2508	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
944	prepares [preparecnt - 1] = w;	2509	prepares [preparecnt - 1] = w;
945	}	2510	}
946		2511
947	void	2512	void
948	ev_prepare_stop (struct ev_prepare *w)	2513	ev_prepare_stop (EV_P_ ev_prepare *w)
949	{	2514	{
950	ev_clear_pending ((W)w);	2515	clear_pending (EV_A_ (W)w);
951	if (ev_is_active (w))	2516	if (expect_false (!ev_is_active (w)))
952	return;	2517	return;
953		2518
		2519	{
		2520	int active = ev_active (w);
		2521
954	prepares [w->active - 1] = prepares [--preparecnt];	2522	prepares [active - 1] = prepares [--preparecnt];
		2523	ev_active (prepares [active - 1]) = active;
		2524	}
		2525
955	ev_stop ((W)w);	2526	ev_stop (EV_A_ (W)w);
956	}	2527	}
957		2528
958	void	2529	void
959	ev_check_start (struct ev_check *w)	2530	ev_check_start (EV_P_ ev_check *w)
960	{	2531	{
961	if (ev_is_active (w))	2532	if (expect_false (ev_is_active (w)))
962	return;	2533	return;
963		2534
964	ev_start ((W)w, ++checkcnt);	2535	ev_start (EV_A_ (W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );	2536	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
966	checks [checkcnt - 1] = w;	2537	checks [checkcnt - 1] = w;
967	}	2538	}
968		2539
969	void	2540	void
970	ev_check_stop (struct ev_check *w)	2541	ev_check_stop (EV_P_ ev_check *w)
971	{	2542	{
972	ev_clear_pending ((W)w);	2543	clear_pending (EV_A_ (W)w);
973	if (ev_is_active (w))	2544	if (expect_false (!ev_is_active (w)))
974	return;	2545	return;
975		2546
		2547	{
		2548	int active = ev_active (w);
		2549
976	checks [w->active - 1] = checks [--checkcnt];	2550	checks [active - 1] = checks [--checkcnt];
		2551	ev_active (checks [active - 1]) = active;
		2552	}
		2553
977	ev_stop ((W)w);	2554	ev_stop (EV_A_ (W)w);
978	}	2555	}
979		2556
980	void	2557	#if EV_EMBED_ENABLE
981	ev_child_start (struct ev_child *w)	2558	void noinline
		2559	ev_embed_sweep (EV_P_ ev_embed *w)
982	{	2560	{
		2561	ev_loop (w->other, EVLOOP_NONBLOCK);
		2562	}
		2563
		2564	static void
		2565	embed_io_cb (EV_P_ ev_io *io, int revents)
		2566	{
		2567	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2568
983	if (ev_is_active (w))	2569	if (ev_cb (w))
		2570	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2571	else
		2572	ev_loop (w->other, EVLOOP_NONBLOCK);
		2573	}
		2574
		2575	static void
		2576	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2577	{
		2578	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2579
		2580	{
		2581	struct ev_loop *loop = w->other;
		2582
		2583	while (fdchangecnt)
		2584	{
		2585	fd_reify (EV_A);
		2586	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2587	}
		2588	}
		2589	}
		2590
		2591	#if 0
		2592	static void
		2593	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2594	{
		2595	ev_idle_stop (EV_A_ idle);
		2596	}
		2597	#endif
		2598
		2599	void
		2600	ev_embed_start (EV_P_ ev_embed *w)
		2601	{
		2602	if (expect_false (ev_is_active (w)))
984	return;	2603	return;
985		2604
		2605	{
		2606	struct ev_loop *loop = w->other;
		2607	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2608	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2609	}
		2610
		2611	ev_set_priority (&w->io, ev_priority (w));
		2612	ev_io_start (EV_A_ &w->io);
		2613
		2614	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2615	ev_set_priority (&w->prepare, EV_MINPRI);
		2616	ev_prepare_start (EV_A_ &w->prepare);
		2617
		2618	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2619
986	ev_start ((W)w, 1);	2620	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	2621	}
989		2622
990	void	2623	void
991	ev_child_stop (struct ev_child *w)	2624	ev_embed_stop (EV_P_ ev_embed *w)
992	{	2625	{
993	ev_clear_pending ((W)w);	2626	clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	2627	if (expect_false (!ev_is_active (w)))
995	return;	2628	return;
996		2629
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2630	ev_io_stop (EV_A_ &w->io);
		2631	ev_prepare_stop (EV_A_ &w->prepare);
		2632
998	ev_stop ((W)w);	2633	ev_stop (EV_A_ (W)w);
999	}	2634	}
		2635	#endif
		2636
		2637	#if EV_FORK_ENABLE
		2638	void
		2639	ev_fork_start (EV_P_ ev_fork *w)
		2640	{
		2641	if (expect_false (ev_is_active (w)))
		2642	return;
		2643
		2644	ev_start (EV_A_ (W)w, ++forkcnt);
		2645	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2646	forks [forkcnt - 1] = w;
		2647	}
		2648
		2649	void
		2650	ev_fork_stop (EV_P_ ev_fork *w)
		2651	{
		2652	clear_pending (EV_A_ (W)w);
		2653	if (expect_false (!ev_is_active (w)))
		2654	return;
		2655
		2656	{
		2657	int active = ev_active (w);
		2658
		2659	forks [active - 1] = forks [--forkcnt];
		2660	ev_active (forks [active - 1]) = active;
		2661	}
		2662
		2663	ev_stop (EV_A_ (W)w);
		2664	}
		2665	#endif
		2666
		2667	#if EV_ASYNC_ENABLE
		2668	void
		2669	ev_async_start (EV_P_ ev_async *w)
		2670	{
		2671	if (expect_false (ev_is_active (w)))
		2672	return;
		2673
		2674	evpipe_init (EV_A);
		2675
		2676	ev_start (EV_A_ (W)w, ++asynccnt);
		2677	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2678	asyncs [asynccnt - 1] = w;
		2679	}
		2680
		2681	void
		2682	ev_async_stop (EV_P_ ev_async *w)
		2683	{
		2684	clear_pending (EV_A_ (W)w);
		2685	if (expect_false (!ev_is_active (w)))
		2686	return;
		2687
		2688	{
		2689	int active = ev_active (w);
		2690
		2691	asyncs [active - 1] = asyncs [--asynccnt];
		2692	ev_active (asyncs [active - 1]) = active;
		2693	}
		2694
		2695	ev_stop (EV_A_ (W)w);
		2696	}
		2697
		2698	void
		2699	ev_async_send (EV_P_ ev_async *w)
		2700	{
		2701	w->sent = 1;
		2702	evpipe_write (EV_A_ &gotasync);
		2703	}
		2704	#endif
1000		2705
1001	/*****************************************************************************/	2706	/*****************************************************************************/
1002		2707
1003	struct ev_once	2708	struct ev_once
1004	{	2709	{
1005	struct ev_io io;	2710	ev_io io;
1006	struct ev_timer to;	2711	ev_timer to;
1007	void (*cb)(int revents, void *arg);	2712	void (*cb)(int revents, void *arg);
1008	void *arg;	2713	void *arg;
1009	};	2714	};
1010		2715
1011	static void	2716	static void
1012	once_cb (struct ev_once *once, int revents)	2717	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	2718	{
1014	void (*cb)(int revents, void *arg) = once->cb;	2719	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	2720	void *arg = once->arg;
1016		2721
1017	ev_io_stop (&once->io);	2722	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	2723	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	2724	ev_free (once);
1020		2725
1021	cb (revents, arg);	2726	cb (revents, arg);
1022	}	2727	}
1023		2728
1024	static void	2729	static void
1025	once_cb_io (struct ev_io *w, int revents)	2730	once_cb_io (EV_P_ ev_io *w, int revents)
1026	{	2731	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2732	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	2733	}
1029		2734
1030	static void	2735	static void
1031	once_cb_to (struct ev_timer *w, int revents)	2736	once_cb_to (EV_P_ ev_timer *w, int revents)
1032	{	2737	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2738	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	2739	}
1035		2740
1036	void	2741	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2742	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	2743	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	2744	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040		2745
1041	if (!once)	2746	if (expect_false (!once))
		2747	{
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2748	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	2749	return;
1044	{	2750	}
		2751
1045	once->cb = cb;	2752	once->cb = cb;
1046	once->arg = arg;	2753	once->arg = arg;
1047		2754
1048	ev_watcher_init (&once->io, once_cb_io);	2755	ev_init (&once->io, once_cb_io);
1049	if (fd >= 0)	2756	if (fd >= 0)
1050	{	2757	{
1051	ev_io_set (&once->io, fd, events);	2758	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	2759	ev_io_start (EV_A_ &once->io);
1053	}	2760	}
1054		2761
1055	ev_watcher_init (&once->to, once_cb_to);	2762	ev_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	2763	if (timeout >= 0.)
1057	{	2764	{
1058	ev_timer_set (&once->to, timeout, 0.);	2765	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	2766	ev_timer_start (EV_A_ &once->to);
1060	}
1061	}
1062	}
1063
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{	2767	}
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}	2768	}
1141		2769
		2770	#if EV_MULTIPLICITY
		2771	#include "ev_wrap.h"
1142	#endif	2772	#endif
1143		2773
		2774	#ifdef __cplusplus
		2775	}
		2776	#endif
1144		2777
1145
1146

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